Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c65acabd2f1419b4ab5595ac3f95d99641800b62446c85236de2c538f273149' 
  AND token = 'YHvHqHVthovnuYQ23Rk9y/kVDZnuJ2y2weSkR+fs0tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}